A

2

B

8

C

64

D

6

Text Solution

Verified by Experts

The correct Answer is:
B
`sqrt((3)^(2)+(4)^(2))`
`=sqrt(9+16)=sqrt(25)=5`
`sqrt((5)^(2)+(12)^(2))`
`=sqrt(25+144)=sqrt(169)=13`
`rArr(?)^(2)+(15)^(2)=(17)^(2)`
`rArr(?)^(2)=289-225=64`
`:. ?=sqrt(64)=8`
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